Commonly, a voucher is a document that shows goods have bought or services have been rendered, authorizes payment, and indicates the ledger account(s) in which these transactions have to be recorded.
It was the first product in a major class of drugs for depression called selective serotonin reuptake inhibitors. Prozac was first introduced to the U.S. market in January 1988, and it gained its most prescribed status within two years.
In August 1989, less than a month before the shooting, Wesbecker had started taking Prozac. The wounded and the families of those killed filed a lawsuit against the drug's manufacturer, Eli Lilly and Company, claiming that Wesbecker's use of Prozac contributed to his actions.